For purposes of this article, the following definitions apply:

1. (a) “Federal agency” means the United States Environmental Protection Agency, including Region 9 of that agency.

2. (b)

   1. (1) “Gravity-based energy storage well” means a well that meets all of the following:

      1. (A) The well is plugged with all perforations sealed, including by the use of permanent bridge plug.
      2. (B) The well is isolated from a hydrocarbon reservoir.
      3. (C) The well has mechanical integrity.
      4. (D) The well is not a conduit for fluid migration into a beneficial use aquifer.
      5. (E) The well is exclusively used to store or generate energy by raising or lowering a weight within the well casing.
   2. (2) A well that has been fully plugged and abandoned pursuant to Section 3208 is not eligible to be a gravity-based energy storage well.
   3. (3) A well listed as an orphan well pursuant to subparagraph (C) of paragraph (1) of subdivision (a) of Section 3206.3 or an idle-deserted well, as defined in Section 3251, is eligible to be converted for use as a gravity-based energy storage well if all applicable and necessary rights to do so have been obtained.